ENGINEERING CALCULATION SHEET AIR RESOURCES DIVISION

Transcription

1 Page 1 of 13 DATE APPLICATION RECEIVED: June 6, Application # FY96-TV010 FACILITY DESCRIPTION Wheelabrator-Claremont (Wheelabrator) operates a resource recovery facility in Claremont, NH. The resource recovery facility burns municipal solid waste (MSW) in two 100 tons/day mass burn units that generate steam. The steam drives a turbine generator to produce electricity for sale to the local utility. The gross generating capacity of the facility at the maximum capacity rating is nominally 6 MW. The MSW combustors are two identical mass-fired waterwall boilers each with a maximum heat input rate of 43.1 MMBTU/hr (9583 lb/hr MSW based on a heating value of 4500 BTU/lb). Each unit is equipped with a single auxiliary propane fired burner rated at a maximum of 15 MMBTU/hr. Emissions from each boiler are currently controlled by a dry lime injection system and a fabric filter prior to exhausting to the atmosphere. The quenched bottom ash from each boiler is transformed by a drag conveyor to an ash bin. Flyash is mixed in an ash pelletizer and added to the bottom ash on the ash on the drag conveyor. The mixed ash is loaded into containers in the enclosed ash bay, and full containers are stored on site prior to transport to the ash residue monofill. Wheelabrator will install a powdered activated carbon injection system (PACIS), an evaporative cooling system (ECS) and upgrade the fabric filters from fiberglass bags to Ryton bags. The facility is making these changes to comply with the requirements of Env-A PROJECT DESCRIPTION The purpose of this project is to review Wheelabrator s Title V application. This Permit covers the following emission units: Device Unit #1 - MSW Boiler (Waterwall Boiler) Unit #2 - MSW Boiler (Waterwall Boiler) Table 1 Emission Units Manufacturer, Model, Installation Date American Shack/Von Roll Grates, Serial No BX, Installed American Shack/Von Roll Grates, Serial No BX, Installed Operating Limitations 1. The maximum heat input of each device shall be limited to 43.1 MMBTU/hr. 2. The maximum municipal solid waste throughput per year shall be limited to 36,500 tons (per each device). CONTROL DEVICE DESCRIPTION Pollutants in the flue gases from each boiler are controlled by two identical dry lime injection scrubbers (DLIS) and two identical fabric filter baghouses (FFBH). The lime reagent is blown into the exhaust ductwork at a point between the spark trap and the fabric filter baghouses. After the treatment in the DLIS, the flue gas from each boiler is directed to its associated FFBH. Particulate matter deposited on the fabric filter bags is removed by a pulse jet air stream. The flue gas from each boiler is emitted to the atmosphere through individual flues within a dual flue, insulated stack, the top of which is 150 feet above ground level. The boilers are equipped with a single timeshared extractive Continuous Emissions Monitoring System (CEMS) for the measurement of CO emissions. Each boiler is equipped is equipped with a Continuous Opacity Monitoring System (COMS) for the measurement of opacity. The CEMS is also equipped with a diluent O 2 monitor. The new ECS 1 will be installed upstream of the existing fabric filters in the area that is currently occupied by the spark arrestors. The ECS will reduce the economizer exit flue gas temperature so that the carbon will optimally react with mercury. Finely atomized water droplets are evaporated in high-temperature exhaust gases to lower temperature and raise humidity. By lowering gas temperatures quickly, ECS reduces dioxin and furan formation. 1 ECS and PACIS permitted under FP-T-0108

2 Page 2 of 13 The PACIS will primarily control mercury and also enhance the reduction in organic emissions (dioxins/furans). The powdered activated carbon (PAC) will be delivered pneumatically to the economizer outlet duct downstream of the ECS using bulk bag feeder/eductor systems. The system will also include a control panel, blowers, feeders/eductors and piping. The PAC will be delivered in 1000 lb bulk bags. The bags will discharge to a surge hopper. The surge hopper will discharge to a volumetric screw feeder. The screw feeder will discharge to a venturi eductor. A dedicated, positive displacement blower will provide the conveying air to the throat of the venturi eductor, drawing in the activated carbon, and additional conveying air. The activated carbon will then be pneumatically conveyed using carbon steel pipe to the downstream ductwork of the ECS. The existing dry lime injection system will remain in service. The DLIS will control emissions of SO 2 and HCl. The injected lime will absorb acid gases like SO 2 and HCl. The downstream fabric filter will provide the final acid gas and particulate matter removal. The fabric filter (for each boiler) currently utilizes fiberglass bags. The bags will be replaced with Ryton bags, which will have a longer operating life than the fiberglass bags. As required by Env-A 3300, Wheelabrator will install CEMS to monitor SO 2 emissions. Env-A 3300 Env-A 3300 is applicable to existing MWC units with a capacity to combust more than 35 tons per day of MSW. US EPA developed emission guidelines for existing small MWC units (40 CFR 60, Subpart BBBB) in accordance with sections 111(d) and 129 of the Clean Air Act. NH DES was required to submit a state plan to EPA that implements the emission guidelines contained in subpart BBBB. Env-A 3300 was adopted by ARD on 6/7/02. The state plan was submitted to EPA on August 16, 2002 and was approved on February 10, The rule became effective (i.e., federally enforceable) on April 11, Wheelabrator is required to follow the following compliance schedule as set forth in Env-A : The MWC units (EU01 & EU02) shall comply with the emission limits specified in Env-A 3303 by April 11, 2004, except as provided below: a. MWC units requiring more time to comply with the emission limits specified in Env-A 3303 shall comply with such requirements by December 6, 2005 by submitting the following: i. A final control plan by October 11, 2003; and ii. Notification of compliance by December 6, EMISSION LIMITS Table 2 - Applicable prior to the final compliance date set forth in Env-A 3300 Pollutant Emission Limit Basis PM % CO 2 SO lbs/hr PO-C-362 & PO-C-363 NOx 0.53 lb/mmbtu Env-A (NOx RACT for Incinerators) CO 12 lbs/hr (3-hr rolling 7% O % O 2 (4-day rolling average) 2 PO-C-362 & PO-C % O 2 (8-hr rolling average) 2 HCl 50 7% O 2 or 90% removal efficiency Env-A ,3,7,8 TCDD 3.4 e-07 lb/hr PO-C-362 & PO-C Based on Dioxin Emission Control Policy, Guideline for Incinerators and Resource Recovery Facilities (Approved by NH Air Resources Commission on April 17, 1986).

3 Page 3 of 13 Table 2 - Applicable prior to the final compliance date set forth in Env-A 3300 Pollutant Emission Limit Basis 2,3,7,8 TCDF 4.75 e-06 lb/hr Opacity 20% (based on 6 minute averages) Env-A (a) Table 3 - Applicable after the final compliance date set forth in Env-A 3300 Pollutant Emission Limit Averaging Time Authority Compliance date NOx 0.53 lb/mmbtu 24-hr calendar day average Env-A May 31, 1995; Facility in compliance PM 0.02 gr/dscf at 12% CO 2 (1.87 lb/hr) 3 Existing Permits PO-C-362 & 363 SO 2 77 ppmdv, or 50% of the 24-hour daily block Env-A (a) CO potential sulfur dioxide emission concentration 100 ppmdv geometric average concentration or percent reduction 4-hour (block averages, Env-A (a) After the final compliance date set forth in Env-A arithmetic mean) HCl 50 7% O 2 or Based on 3-run stack Env-A % removal efficiency 4 test Pb 1.6 mg/dscm 3-run average (run duration specified in test method) Env-A (b) Hg mg/dscm 5 or 85% control efficiency 3-run average (run duration specified in test method) Cd 0.1 mg/dscm 3-run average (run duration specified in test method) Dioxins/Furans 125 ng/dscm (total mass) 3-run average (minimum run duration is 4 hours) Fugitive Ash Visible emissions for no more than 5% of hourly observation period 3 1-hour observation periods Opacity 10% Consecutive 6-minute block period in any 60 minute period. EMISSION CALCULATIONS Table 4 - Emission Rates based on AP-42 emission factors Env-A (b) Env-A (b) Env-A (b) Env-A (b) Env-A 3300 No later than 21 months after the issuance of T/P FP-T-x.xx After the final compliance date set forth in Env-A This limit is more stringent than the limit imposed by Env-A 3300 (70 7% O 2 ). 70 mg/dscm = 14,389 dscf/mmbtu (F d factor at 7% O 2 ) x 43.1 MMBTU/hr (heat input) x 70 mg/dscm (limit) x 1 lb/453,600 mg x 1 dscm/35.31 dscf = 2.71 lb/hr 4 This limit is more stringent than NSPS subpart BBBB (250 ppmdv or 50% removal efficiency) 5 This limit is more stringent than NSPS subpart BBBB (0.08 mg/dscm)

4 Page 4 of 13 Pollutant AP-42 emission factor (lb/ton) Uncontrolled emission rates for each MWC unit Uncontrolled Potential emissions for each MWC unit (TPY) PM SO NOx CO HCl As 4.37E Cd 1.09E Cr 8.97E Hg 5.60E Ni 7.85E Pb 2.13E CDD/CDF E E E-05 MWC = Municipal Waste Combustion Emission factors are taken from Tables of AP-42 Chapter 2.1 Refuse Combustion. Maximum charge rate for each unit = 9583 lbs/hr of MSW. Potential emissions based on 36,500 tons/yr of MSW (annual limit). Emission rates based on permit limits Table 5 - Most Stringent Emission Limits Pollutant Emission limit (existing permits) 7 Emission rate Emission limit (Env-A 3300) Emission rate Most stringent limit PM 0.02 gr/dscf at 12% % O lb/hr CO 2 (this is equivalent to gr/dscf at 7% O 2 ) SO lb/hr % O 2 or 50% lb/hr reduction of PTE NOx 0.53 lb/mmbtu None for Class II MSW lb/hr (NOx RACT) units 8 CO 12 lb/hr % O lb/hr HCl 7.5 lb/hr ppmdv at 7% O 2 or 50% reduction, least stringent (Env-A 3300) 50 ppmdv at 7% O 2 or 90% reduction, least stringent (Env-A 1900) (based on Env-A 1900) lb/hr 6 Total tetra-through octa-chlorinated dibenzo-p-dioxin/chlorinated dibenzofurans, 2,3,7,8-tetrachlorodibenzo-p-dioxin, and dibenzofurans. 7 PO-C-362 & Class II units mean small MWC units ( tons/day capacity) that are located at MWC plants with aggregate plant combustion capacity less than or equal to 250 tons/day of MSW.

5 Page 5 of 13 Table 5 - Most Stringent Emission Limits Pollutant Emission limit (existing permits) 7 Emission rate Emission limit (Env-A 3300) Emission rate Most stringent limit Lead (Pb) mg/dscm lb/hr Cadmium mg/dscm lb/hr (Cd) Mercury (Hg) mg/dscm or 85% reduction lb/hr (based on concentration limit) or lb/hr (based on % reduction) Dioxins 125 ng/dscm 4.84 x 10-6 lb/hr 4.84 x 10-6 lb/hr Calculations: F-Values for Refuse (F-factor is the ratio of the gas volume of the products of combustion to the heat content of the fuel) F d factor (at 0% O 2 ) = 9570 dscf/mmbtu (From Table 19-1, 40 CFR 60, Appendix A, Method 19) F d factor at 7% O 2 = 9570 x (20.9-0%)/(20.9-7%) = dscf/mmbtu F c factor (CO 2 basis) = 1820 dscf/mmbtu (From Table 19-1, 40 CFR 60, Appendix A, Method 19) Ultimate CO 2 in the flue gas = (1820/9570) x 100 = 19.02% To calculate the equivalent of 12% CO 2 O 2 = 20.9 {(20.9/ultimate CO 2 ) x 12% CO 2 } = 7.71% i.e., 12% CO 2 ~ 7.71% O 2 Particulate Matter Existing permit limit for PM = 0.02 gr/dscf at 12% CO 2 (i.e., at 7.71% O 2 ) We need to convert this value to gr/dscf at 7% O 2 so we can compare this to Env-A 3300 limit (which is measured at 7% O 2 ) PM limit at 7% O 2 = 0.02 x {(20.9-7)/( %)} = gr/dscf (calculated using Eq. 3 of the Title V Permit) Convert this to lb/hr PM emission rate (based on existing permit) = 14,389 dscf/mmbtu (F d O 2 ) x 43.1 MMBTU/hr (max. heat input) x gr/dscf (emission limit) x 1 lb/7000 gr = 1.86 lb/hr PM emission rate (based on Env-A 3300 limit) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 70 mg/dscm x 1 lb/453,600 mg x 1 dscm/35.31 dscf = 2.71 lb/hr SO 2 Wheelabrator chose to comply with the outlet concentration limit of 77 7% O 2 SO 2 allowable emission rate = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 77 parts/10 6 parts x 64 lb/lb-mole (Molecular weight) x 1 lbmole/385.3 dscf (molar volume) = 7.93 lb/hr NOx NOx allowable emission limit (based on NOx RACT) = 0.53 lb/mmbtu x 43.1 MMBTU/hr = lb/hr

6 Page 6 of 13 CO CO allowable emission rate = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 100 parts/10 6 parts x 28 lb/lb-mole (Molecular weight) x 1 lbmole/385.3 dscf (molar volume) = 4.51 lb/hr HCl HCl allowable (based on Env-A 1900) = 50 ppmdv at 7% O 2 or 90% reduction, least stringent HCl allowable rate (based on 50 ppmdv) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 50 parts/10 6 parts x 36.5 lb/lb-mole (Molecular weight) x 1 lb-mole/385.3 dscf (molar volume) = 2.94 lb/hr HCl allowable rate (based on 90% reduction) = 6.4 lb/ton (AP-42 emission factor) x 9583/2000 tons/hr (max. processing rate) x 0.1 = 3.07 lb/hr HCl allowable rate (based on Env-3300) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 250 parts/10 6 parts x 36.5 lb/lb-mole (Molecular weight) x 1 lb-mole/385.3 dscf (molar volume) =14.69 lb/hr Metals Lead allowable emission rate (based on Env-A 3300 limit) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 1.6 mg/dscm x 1 lb/453,600 mg x 1 dscm/35.31 dscf = lb/hr Cadmium allowable emission rate (based on Env-A 3300 limit) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 0.1 mg/dscm x 1 lb/453,600 mg x 1 dscm/35.31 dscf = lb/hr Mercury allowable emission rate (based on Env-A 3300 limit) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x mg/dscm x 1 lb/453,600 mg x 1 dscm/35.31 dscf = lb/hr Based on 85% reduction Mercury allowable rate = 5.6 x lb/ton (AP-42 emission factor) x 9583/2000 tons/hr (max. processing rate) x 0.15 = lb/hr Dioxins/Furans Dioxins allowable emission rate (based on Env-A 3300) = 14,389 dscf/mmbtu x 43.1 MMBTU/hr x 125 ng/dscm x 1 lb/453.6 x 10 9 ng x 1 dscm/35.31 dscf = 4.84 x lb/hr

7 Page 7 of 13 SUMMARY OF PREVIOUS STACK TESTS Pollutant PM SO (June 15-18, 1993) % CO % O 2 (0.75 lb/hr) Removal eff. = 93.8% Table 6 - Stack test Results Emission 1998 (April (July 25- limits from 1993 (June (April 20-23, 1998) 27, 2000) PO-C-362 & 18, 1993) 23, 1998) 363 MSW Unit 1 MSW Unit e-04 12% CO % O 2 (12.4 lb/hr) 43.9% NOx 18.4 lb/hr lb/mmbtu CO % (3-hr avg) HCl % O 2 (2.16 lb/hr) Removal eff. = 86.9% % O 2 (1.8 lb/hr) 95.2% % CO lb/hr Removal eff 9. = 72.7% 0.44 lb/mmbtu % O 2 (1.25 lb/hr) 19 ppm (1.37 lb/hr) Removal eff 9. = 96.7% % CO 2 (1.87 lb/hr) % CO lb/hr 76.8 ppm (9.65 lb/hr) 49.5% 1.0 e-03 12% CO % O 2 (7 lb/hr) 53.5% 0.53 lb/mmbtu lb/hr lb/mmbtu 12 lb/hr (3-hr 1.76 rolling avg.) 7% (3-hr avg) 7.5 lb/hr & also comply with 50 7% O 2 or 90% removal efficiency 42.5 ppm (2.64 lb/hr) Removal eff. = 89.9% % O 2 (1.7 lb/hr) 95.5% 2000 (July 25-27, 2000) % CO lb/hr 86.6% 0.43 lb/mmbtu 7% O 2 (3.27 lb/hr) 17.7 ppm (1.25 lb/hr) 97.5% 2,3,7,8 TCDD 1.64e-07 lb/hr 6.06 e-09 lb/hr 5.0e-09 lb/hr 3.4 e-07 lb/hr 6.43e-08 lb/hr 8.64 e-09 lb/hr 8.5e-09 lb/hr 2,3,7,8 TCDF 4.9e-07 lb/hr 4.92 e-08 lb/hr 2.0e-08 lb/hr 4.75 e-06 lb/hr 2.14e-07 lb/hr 8.35 e-08 lb/hr 3.5e-08 lb/hr Total PCDD & PCDF Mercury lb/hr O 2 (4.45e-03 lb/hr) % O 2 (0.011 ng/dscm EPA TEQ) μg/m O 2 ( lb/hr) lb/hr 98.3 O 2 (4.21e-03) 7.3% % O 2 (0.046 ng/dscm EPA TEQ) 98.3 μg/m O 2 ( lb/hr) 60.3 Arsenic 5.11e-05 lb/hr ND 1.67e-05 lb/hr 6.12e-05 lb/hr ND 7.8e-06 lb/hr Beryllium ND ND ND ND ND ND Cadmium 1.78e e-05 lb/hr 4.51e e e-05 lb/hr 7.85e-06 Chromium 7.35e e e e e e-05 Copper 3.25e e e e e e-05 Lead e e e e-04 Nickel 5.44e e e e e e-05 Selenium ND ND ND ND ND 1.01e-05 9 Concentration based 10 Compliance date May 31, Prior to this date, facility was required to comply with the NOx emission limit of 26.5 lb/hr (PO-C- 362 & 363). 11 For Unit #2, in run #3, the outlet concentration was higher than the inlet concentration. Hence the overall removal efficiency was very low.

8 Page 8 of 13 Pollutant 1993 (June 15-18, 1993) 1998 (April 20-23, 1998) Table 6 - Stack test Results Emission 2000 (July 25- limits from 27, 2000) PO-C-362 & (June 15-18, 1993) 1998 (April 20-23, 1998) 2000 (July 25-27, 2000) MSW Unit 1 MSW Unit 2 Zinc e e e e-04 Results of NOx RACT emission testing (April 24, 1995) Table 7 - NOx Tests Average NOx (lb/mmbtu) MSW Unit MSW Unit NOx RACT limit (Env-A ) 0.53 lb/mmbtu Stack testing requirements: 1. The Permittee shall conduct stack testing for PM, Opacity, HCl, Dioxins/furans, Cadmium, Lead and Fugitive ash within 180 days after the final compliance date. Annual stack testing is also required for these pollutants. 2. For Mercury - within 21 months after the issuance of the Temporary permit. Conduct quarterly testing, alternating emission units each quarter for a period of one year. If the annual average of the quarterly testing is less than or equal to mg/dscm or 85% control efficiency, annual testing may be conducted for both units. 3. NOx - Annually to demonstrate compliance with NOx RACT (Env-A requires NOx RACT testing every 3 years; however facility agreed to conduct this testing every year). 4. Compliance with SO 2 and CO limits shall be verified through CEMS. 5. At the performance testing conducted pursuant to Item #6 of Table 5b of the TV permit, the Permittee shall conduct optimization tests to determine the optimized carbon feed rate of the powder activated carbon injection system for which the mercury emissions are optimally minimized below the applicable limits. MONITORING REQUIREMENTS The facility shall meet the following monitoring requirements: 1. Continuous Emissions Monitoring for SO 2, CO and CO 2 or O 2 a. Measure CO 2 or O 2 at each location where SO 2 or CO are measured. b. Obtain 1-hr averages of SO 2, CO and CO 2 or O 2. c. Collect minimum amount of data specified in 40 CFR d. Conduct initial, daily, quarterly and annual evaluations of the CEM systems in accordance with Env-A 3300 and Env-A Continuous Opacity Monitoring 3. Continuous Parameter Monitoring a. Load level i. Continuously measure and record steam or feed water in pounds/hour. ii. Calculate 4-hr block average. iii. Calibrate the steam (feed water) flow meter at least once a year in accordance with manufacturer s specifications. b. Temperature of the flue gases at the inlet of each PM control device (i.e., each baghouse); Continuously measure the temperature. i. Obtain 4-hr block average

9 Page 9 of 13 c. Carbon feed rate; Optimum feed rate to be determined during initial stack testing for mercury or dioxins/furans. i. Monitor the usage of carbon and calculate 8-hr block average. d. Obtain 1-hr averages of load level, temperature and carbon feed rate. e. Collect minimum amount of data required by 40 CFR

10 Page 10 of 13 RECORDKEEPING REQUIREMENTS 1. Monthly lime usage records for DLIS. 2. Comply with the recordkeeping requirements of 40 CFR , , , , , & Comply with the recordkeeping requirements of Env-A (General Recordkeeping) and Env-A (NOx recordkeeping). REPORTING REQUIREMENTS 1. Comply with the reporting requirements of 40 CFR , , , , , , , & Comply with the reporting requirements of Env-A (General reporting) and Env-A (NOx Reporting). MODELING The following Tables summarize facility s compliance with Env-A 300 and Env-A Pre-retrofit Modeling results from 12/27/99 & 1/17/03 for CO Stack Parameters Height = 150 feet Diameter = 2.6 feet Exhaust flow rate = ACFM (from Title V application); Modeling used this flow rate x 2 Exhaust Temp. = 341 o F Impacts (1 lb/hr) ug/m 3 Annual hr (high) hr (HSH) hr hr hr 4.92 HSH = High Second High Criteria Pollutant Each unit MWC Units Both units Basis 24-hr impact Annual impact 3-hr impact 8-hr impact 1-hr impact 24-hr Annual 3-hr 8-hr 1-hr ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 PM Title V App SO NO x Title V App & Old Permits * Title V App & NOx RACT CO Title V App This is based on the permit limit of 0.02 gr/dscf at 12% CO 2. In the TV application, the PM emission rate is calculated as shown below: 0.02 gr/dscf x dscf/min (maximum recorded stack test flow rate) x 1 lb/7000gr x 60 min/hr = 3.2 lb/hr The emission rate that I calculated in Table 5 (1.86 lb/hr) is based on F d factor at 7% O 2 and max. heat input (43.1 MMBTU/hr). I used the higher number (i.e., 3.2 lb/hr) to show compliance with N.

11 Page 11 of 13 * PO-C-362 & 363 RTAP MWC Units Basis 24-hr impact Annual impact 24-hr AAL Annual AAL Each unit Both units ug/m 3 ug/m 3 ug/m 3 ug/m 3 HCl Title V App TCDD E-07 Title V App 4.012E E TCDF E-06 Title V App E Lead Nickel 1.91E E stack test (emission rate for unit 2; Assumed the same rate for unit 1 also.) 1998 stack test; (emission rate for unit 2; assumed the same for unit 1 also) E Chromium 9.19E E-04 Same as above E Cadmium stack test (emission rate for unit 1; assumed the same for unit 2 also.) E Mercury Same as above Arsenic stack test; (emission rate for unit 2; assumed the same for unit 1 also) E Cobalt E-04 Title V application E Manganese Title V application HF Title V application H 2 SO 4 mist Title V application PCB 7.35E E-07 Title V application 8.673E E PAH E-04 Title V application E-06 Copper 3.25E E stack test (emission rate for unit 1; Assumed the same rate for unit 2 also.) E Zinc 6.85E E-02 Same as above Waste oil heater MWC Units (both) Combined impacts Ambient Air Limits Pollutant Emission rate 24-hr impact Annual impact Emission rate 24-hr impact Annual impact 24-hr impact Annual impact 24-hr AAL Annual AAL lb/hr ug/m 3 ug/m 3 lb/hr ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 Arsenic E Chromium E Cadmium Lead PCB E E E Total Halogens Total Halogens (for HCl) (for PCE) 20 Normalized heater impact at 1 lb/hr (1 hour average) = ug/m 3 24-hr (1 lb/hr) impact = 0.4 x = ug/m 3 Annual (1 lb/hr) impact = 0.1 x = ug/m 3

12 Page 12 of 13 Post Retrofit Modeling results from 01/31/03 Stack Parameters Height = 150 feet Diameter = 2.6 feet Exhaust flow rate = 26,000 ACFM; Modeling used this flow rate x 2 Exhaust Temp. = 320 o F Impacts (1 lb/hr) ug/m 3 Annual hr (high) hr (HSH) hr hr hr Criteria Pollutant MWC Units Basis 24-hr impact Each unit Both units Annual impact 3-hr impact 8-hr impact 1-hr impact 24-hr Annual 3-hr 8-hr 1-hr ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 PM Title V App SO Env-A NO x NOx RACT CO Env-A RTAP MWC Units Basis 24-hr impact Annual impact 24-hr AAL Annual AAL Each unit Both units ug/m 3 ug/m 3 ug/m 3 ug/m 3 HCl Env-A TCDD 4.84E E-06 Env-A E E TCDF 4.84E E-06 Env-A E E Lead Env-A Nickel 1.91E E stack test; (emission rate for unit 2; assumed the same for unit 1 also) E Chromium 9.19E E-04 Same as above E Cadmium Env-A Mercury stack test (emission rate for unit 1; Assumed the same rate for unit 2 also.) Mercury Env-A 3300 (85% reduction of potential emission rate) Arsenic 6.12E stack test; (emission rate for unit 2; assumed the same for unit 1 also) 7.026E E Cobalt E-04 Title V application E

13 Page 13 of 13 RTAP MWC Units Basis 24-hr impact Annual impact 24-hr AAL Annual AAL Each unit Both units ug/m 3 ug/m 3 ug/m 3 ug/m 3 Manganese Title V application HF Title V application H 2 SO 4 mist Title V application PCB 7.35E E-07 Title V application 8.438E E PAH E-04 Title V application 8.725E E-06 Copper 3.25E E stack test (emission rate for unit 1; Assumed the same rate for unit 2 also.) E Zinc 6.85E E-02 Same as above Waste oil heater MWC Units (both) Combined impacts Pollutant Emission rate 24-hr impact Annual impact Emission rate 24-hr impact Annual impact 24-hr impact Annual impact 24-hr AAL Annual AAL lb/hr ug/m 3 ug/m 3 lb/hr ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 ug/m 3 Arsenic E E Chromium E Cadmium Lead PCB E E E Total Halogens (for HCl) 405 Total Halogens (for PCE) 20 Normalized heater impact at 1 lb/hr (1 hour average) = ug/m 3 24-hr (1 lb/hr) impact = 0.4 x = ug/m 3 Annual (1 lb/hr) impact = 0.1 x = ug/m 3 INSIGNIFICANT ACTIVITIES Insignificant Activity Basis 1. Lime Silo Env-A (g) 2. Facility roadways Env-A (g) 3. Safety kleen degreaser Env-A (g) gal Phosphoric acid storage tank Env-A (g) 5. Two 500 gal diesel fuel tanks Env-A (g) 6. Propane Vaporizer (0.2 MMBTU/hr) Below permitting threshold of 10 MMBTU/hr 7. Diesel backup generator (0.57 MMBTU/hr) Below permitting threshold of 1.5 MMBTU/hr 8. Waste oil heater (0.14 MMBTU/hr) - uses specification oil Below permitting threshold of 2 MMBTU/hr

14 Page 14 of 13 REVIEW OF REGULATIONS NSPS 40 CFR 60, Subpart BBBB Emission Guidelines for existing Small MWC Units. 40 CFR 60, Subpart E Standards of Performance for Incinerators (each with a charging rate of more than 50 tons/day); However the PM limit imposed by the state permits is more stringent. NESHAP N/A Title V Yes Env-A 300 ; Facility in compliance Env-A 609 s Env-A 700 Permit Fee System Env-A 800 Testing & Monitoring Procedures Env-A 900 Owner/Operator Obligations Env-A 1211 NOx RACT requirements of Env-A , Incinerators are applicable; Facility shall also comply with NOx RACT Testing requirements of Env-A NOx monitoring requirements of Env-A are not applicable. Env-A 1400 Regulated Toxic Air Pollutants; Facility is in compliance. Env-A 1600 Fuel Specifications for Propane Env-A 3300 Municipal Waste Combustion SUMMARY AND CONCLUSIONS In summary, the operations as applied for will be capable of meeting all regulations and standards for air quality. Title V Operating Permit shall therefore be issued.